4 salt cod loins (previously soaked in water to remove the salt)7 oz (200 g) clams8–10 shrimp1 chopped onion2 minced garlic cloves1 green bell pepper, cut into strips2 ripe tomatoes, peeled and crushed1 cup (8 fl oz / 250 ml) seafood stock1 cup (8 fl oz / 250 ml) white wine (optional)2 tbsp olive oil1 tbsp all-purpose flour (to thicken)Salt and pepper to tasteChopped parsley